Alarm signal



Dec. 13, 1927. 1,652,683

A. N. PIERMAN ALARM S IGNAL Filed Jan. 11, 1924 IN VENTOR.

Patented Dec. 13, 1927.

ALEXANDER N. PIERMAN, F NEWARK, NEW JERSEY.

4mm SIGNAL.

' Application filed January 11, 1924. Serial No. 685,543.

This invention relates to an improved alarm signal which is adapted tobe used primarily on automobiles and the like and is adapted to producearticulate sound in that Warning words or phrases can be emitted fromthe signal, these if desired, being in the form of the name of the carto which the signal is attached thereby also functioning as anadvertisement.

The invention has for its object to provide a horn of this type which issimple in operation and which will clearly enunciate or articulate, thussimulatin the human voice.

The invention is designed to provide a horn which emits sound ofmaterial volume when the vibrating means moves in one direction and ispractically silent when the vibrating means moves in the reversedirection. The horn thus requires but little power to vibrate it and theready return of the vibrating means permits a quick succession ofsounds. I

The invention also resides in certain details of construction which willbe hereinafter more fully described and finally embodied in the claim.

Figure 1 is a section of a signal embodying my invention, the horn beingshown at elevation. Figure 2 is a face view of the 'vibrating bar shownin Fi re 1. Figure 3 is a section similar to Figure 1 but illustratin amodified form of operating means an Figure 4 is a perspective view of anactuating bar shown in Figure 3. Figure 5 is a detailed section showingthe stylus on an enlar ed scale.

In igure 1 I. show a structure by means of which a reciprocating baracts directl on the stylus to cause the diaphragm to v1- tion-and toproduce no material vibration on the return stroke of the bar.

In the drawing Ishow the bar or rod brate when the bar is moved in onedirecand the hand piece 47 by means of which it 1s operated in onedirection, the return be- ,ing accomplished by a spring 48, the barbeing mounted in the suitable frame 49, the bar having the projectingpart 50 into which the soun roove 51 is out which sound groove isadapted to engage the stylus 52 which st lus is pivoted at 53 to thediaphragm tween the plates 54 and has the diaphragm.

In Figure 3 I show a still further modified form in which the diaphragmis provided with a similar tilting stylus 52 but the actuating bar orrod 56 is provided with an extension 57 and has a slot 58 in which thepin 59 of the gear 60 slides, the gear 60 being in mesh with a pinion 61on the motor 62.

his type of horn can be operated by a ush button as is the usualelectrical horn. he open space 63 underneath the raised portion 50provides for suflicient play so that the rod has ac uired speed in itsmovement before the sty us is engaged.

I claim to vibrate the dia hra when moved in one direction, the sty ustilting and being without function on the return stroke of the bar andmeans for reciprocating the bar.

In testimony that I claim the forefomg,

I have hereto set my hand, this 20th December, 1923.

ay of A. N. PIEBMAN.

